Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Test: Alternator vs. no alternator = 10% MPG gain @ 70 km/h

MetroMPG · 07-31-2008, 10:32 AM

blackjackel: my alternator is not physically/mechanically disconnected, it's just electrically disconnected. The stock belt is still turning the alt pulley.

When I originally wrote this thread in 2006, I had removed the belt entirely and fashioned a replacement to turn the water pump because I wanted to remove ALL alternator losses including bearing and pulley fan. This time, I just disconnected the alternator wire.

07-31-2008, 10:32 AM	#17 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,530 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,977 Times in 3,613 Posts	blackjackel: my alternator is not physically/mechanically disconnected, it's just electrically disconnected. The stock belt is still turning the alt pulley. When I originally wrote this thread in 2006, I had removed the belt entirely and fashioned a replacement to turn the water pump because I wanted to remove ALL alternator losses including bearing and pulley fan. This time, I just disconnected the alternator wire. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget